# TODO 逻辑运算符

# # and or not
# a = True
# b = False
# print(a and b)
# print(a or b)
# print(not a)
# print(not b)

# x = 1
# y = 0
# print(x and y)
# print(x or y)
# print(not x)
# print(not y)

#案例 #去网吧上网 满18岁,带身份证
# age = 15
# id_card = True
# print(age>=18 and id_card)

#优先级 先乘除后加减
# print(5+6*3)
# print((5+3)*3)



